(n.) The quality or state of being rancid; a rancid scent or flavor, as of old oil.

carrion decay decomposition dry gangrene dry rot foulness gangrene gas gangrene moist gangrene mortification necrosis necrotic tissue noma putrefaction putrescence putridity putridness rancidity rancidness rankness rot rottenness slough sphacelation sphacelus spoilage tooth decay